Observatory Quest/Quick guide

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Details[edit | edit source]

Start pointMinimap icon Talk to the Observatory professor in the Observatory Reception Room north of Castle Wars. Show on map
Official difficultyIntermediate
DescriptionThe Observatory in south-west Ardougne has been ransacked by a family of nearby goblins. Can you help the professor to rebuild it?
Official lengthShort
Requirements None
Items required
Enemies to defeat
  • Goblin guard (level 42) (Optional – can simply be trapped behind a column)

Walkthrough[edit | edit source]

Map Showing the Observatory Quest Legend:
1: Observatory, a: Furnace (for molten glass and Bronze bar), b: Planks (2x), c: Copper and tin mines, d: Sandpit, e: Superantipoison(1), f: Antipoison(1) chest, g: Trader Crewmember (sells Soda ash and Bucket of Sand, both 5 coins each), A: Quest Area (Area to travel, from begin to end, if item collected beforehand).

Fixing the Observatory[edit | edit source]

  • Speak with the Observatory professor. (Chat 121)
  • Give the Observatory professor the three planks, bronze bar and molten glass (speak to him 3 separate times (Chat 1) each time).
  • Speak to the assistant.
  • Go up the east hill and down the stairs.
  • Once downstairs, search all the chests until you find the goblin kitchen key (most commonly found in south-eastern part when you go down the stairs, don't skip the dialogue once you find the key or you will not pick it up. If not found in the two chests directly south-east from the stairs, it is guaranteed to be in the last chest in the dungeon. The other chests will contain poisonous spiders.).
  • Head north from the entrance in the dungeon, then go west to the kitchen gate and prod the sleeping guard, then kill or trap him.
  • Open the gate and inspect the goblin stove.
  • Go back and speak to the professor with the lens mould in your inventory. (Chat 1) He will give back the needed molten glass for the next part.
  • Use the molten glass on the lens mould.
  • Speak to the professor to give him the lens mould and the observatory lens. (Chat 1)
  • Head back into the goblin dungeon.
  • Run past the kitchen and climb up the stairs in the south end of the dungeon. (During the cutscene, DO NOT CLICK on anything in the observatory or you'll have to restart the cutscene)

Finishing up[edit | edit source]

  • After the cutscene, talk to the professor upstairs and view the telescope. (Chat 1)
  • Talk to the professor and identify the constellation you saw (see table below). (Chat 1) Note: You do not get the reward until you talk to the professor after you have looked into the telescope.
Name & Reward Picture Name & Reward Picture
25 Water runes, uncut sapphire
Star Chart Viewer Aquarius.png Aries
875 Attack experience, uncut sapphire
Star Chart Viewer Aries.png
Amulet of defence, uncut sapphire
Star Chart Viewer Cancer.png Capricorn
875 Strength experience, uncut sapphire
Star Chart Viewer Capricorn.png
Black 2h sword, uncut sapphire
Star Chart Viewer Gemini.png Leo
875 Hitpoints experience, uncut sapphire
Star Chart Viewer Leo.png
3 Law runes, uncut sapphire
Star Chart Viewer Libra.png Pisces
3 Tuna, uncut sapphire
Star Chart Viewer Pisces.png
Maple longbow, uncut sapphire
Star Chart Viewer Sagittarius.png Scorpio
Weapon poison, uncut sapphire
Star Chart Viewer Scorpio.png
Super strength(1), uncut sapphire
Star Chart Viewer Taurus.png Virgo
875 Defence experience, uncut sapphire
Star Chart Viewer Virgo.png
  • Congratulations, quest complete!

Rewards[edit | edit source]

Observatory Quest reward scroll.png